The longest word in english language.


The word Pneumonoultramicroscopicsilicovolcanoconiosis is officially the longest word in English language. It means “a lung disease caused by the inhalation of very fine silica dust, mostly found in volcanos”.

So let’s break it down to understand it better:

  • pneumono = related to lungs (Latin, from Greek)
  • ultra = beyond (Latin, as in “ultraviolet”)
  • microscopic = extremely small (Latin/Old English, from Greek mikron, small, and skopos, view)
  • silico = silica (Latin)
  • volcano = volcano (Latin)
  • coni = related to dust (Greek: konis, dust)
  • osis = disease / condition (Greek)

It is cool to know about the longest word in english. But can you pronounce this 45-letter word in a single breath? 🙂

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  1. That is not the longest word ever recorded though. This word is 207,000 letters long and has only been printed once. It is another word forhuman mitochondrial DNA.

  2. This is hard! I can’t even pronounce this word……think about having to say it all in one breathe! Awesome!

    – Jennie Lin

  3. That is the only longest word I ever heard.I don’t believe that it has a word like this.
    WOW!!!! It is so NICE.

  4. that was my spelling word for 4th grade I got a cirtificate and everything for it. I can still spell it to this day and im in college now

  5. I could easily. If you put it down in those parts it makes it waay easier. Now I get to show off to my friends! Well, if I remember it. I’m going to try to pronounce a waaaay longer word with 1, 185 letters, but for now I’ll stick to this word to get used to long words. Thanks a lot!


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